You shouldn't be concerned about going to Goa in June because there are many spots to get out of the hot sun. Calangute Beach is one of them. It is referred to as the Queen of beaches and is one of Goa's largest beaches. For an exciting experience, there are water activities available at this beach.
Monsoon is not ideal time to visit Goa. You can't enjoy water sports activities nd it's not safe to go near sea during this time. October to March is ideal time